Originally, policy dependencies could only handle objects that had a
`status.complianceState` field. Gatekeeper ConstraintTemplates and
Constraints do not have this field, but we assign them a compliance in
a similar way elsewhere. This commit allows these Gatekeeper types to
be used for policy dependencies like a user might expect.

Refs:
 - https://issues.redhat.com/browse/ACM-8998

Signed-off-by: Justin Kulikauskas <[email protected]>

Since there are more cases now(for the Gatekeeper types) it became clear
that diagnosing why a policy dependency was not met might be difficult.
This adds reasons to the unmet dependencies which will be logged, and
which might in the future be used in status messages.

Signed-off-by: Justin Kulikauskas <[email protected]>